print(a or b or c == d)
print(a or b == c or d)
print(a and b == c or d)
print(a or b == c and d)
print(a or b ~= c or d)
print(a == b or c or d)
print(a < b and c or d)
print(a ~= b or c and d)
print(a == b and c and d)
